Abstract

Respiration rate is a very important vital sign. Different methods of respiration rate measurement or estimation have been developed. However, especially interesting are those that enable remote and unobtrusive monitoring. In this study, we investigated the use of smart glasses for the estimation of respiration rate especially useful for indoors applications. Two methods were analyzed. The first one is based on measurements of respiration-related body movements using an accelerometer. The second one uses the thermal camera to observe temperature changes in the nostril region. For both methods signals were extracted, filtered and processed using two different respiration rate estimators. Both methods were validated during experiments with the participation of volunteers using the respiration belt as a reference measurement method. Results proved that for both methods it is possible to reliable estimate the respiration rate with Root Mean Square Error lower than 2 breaths per minute, which is sufficient for medical screening.

Highlights

  • Smart glasses are wearable devices that can extend human senses and capabilities of information processing

  • We assume that respiration rate can be estimated using analysis of data captured: with accelerometer/gyroscope sensors - for the user of smart glasses and with the thermal camera - for the observed person

  • In this study we proposed the use of smart glasses for the estimation of respiration rate using two sensors

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Summary

Introduction

Smart glasses are wearable devices that can extend human senses and capabilities of information processing. The near-to-eye display could provide graphical information with much higher privacy than a smartphone or a tablet. Smart glasses can be equipped with different sensors (e.g. accelerometers, gyroscopes, cameras), communication interfaces (e.g. WiFi, Bluetooth), etc. Many devices have been proposed on the consumer market, including Google Glass, Epson Moverio BT-200, Recon Jet, Lumus DK40, etc. Many ideas and demonstrations of potential roles of smart glasses in healthcare have been presented. Some include improved visualization of veins locations (Evena Medical [2]), access and visualization of data from medical records [3][4][5], presentation of vital signs on the display of smart glasses (Philips [6]), etc

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